變壓器在運行中,若發現輕瓦斯保護裝置動作,則應立即對變壓器的外部進行檢查。
(1)檢查變壓器儲油櫃中的油位和油的顏色、氣體繼電器中的氣體量與顏色。
(2)檢查變壓器本身和強迫油循環係統中有無漏油之處。
如果上述檢查均未發現有異常現象,進一步就可通過查氣體繼電器中氣體的性質,必要時還可對變壓器油進行取樣、化驗,進行綜合分析來確定故障原因。
氣體繼電器中氣體的性質,可依據表來進行確定。
表 氣體繼電器中氣體性質與顏色對應關係參考表
氣體顏色 無色無味 黃色 淡灰色或強臭 灰色或黑色 可燃性 不可燃 不易燃 可燃 易燃 故障性質 空氣 木質紙麻等絕緣材料 鐵芯
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